阅读说明：本技术 一种城市轨道交通联锁设备运行监测系统 (Urban rail transit interlocking equipment operation monitoring system ) 是由 冯桂平 李斌 张辉 辛骥 徐博 麦景星 翟文革 刘峰 金鑫 张莉 于 2020-04-29 设计创作，主要内容包括：本发明一种城市轨道交通联锁设备运行监测系统,其特征是：至少包括：监测中心管理单元(1)、现场监测管理单元(2),所述多个现场监测管理单元(2)和监测中心管理单元(1)通过网络连接。这种城市轨道交通联锁设备运行监测系统,以便在较短的时间,获取故障位置和故障信息,使维修人员能及时对故障的判断和后续处理。(The invention relates to an operation monitoring system of an urban rail transit interlocking device, which is characterized in that: at least comprises the following steps: the monitoring system comprises a monitoring center management unit (1) and a field monitoring management unit (2), wherein the field monitoring management units (2) are connected with the monitoring center management unit (1) through a network. The operation monitoring system of the urban rail transit interlocking equipment is convenient for acquiring fault positions and fault information in a short time, so that maintenance personnel can judge and subsequently process faults in time.)

1. An operation monitoring system of urban rail transit interlocking equipment is characterized in that: at least comprises the following steps: the monitoring system comprises a monitoring center management unit (1) and a field monitoring management unit (2), wherein the field monitoring management units (2) are connected with the monitoring center management unit (1) through a network;

the on-site monitoring management unit (2) is used for performing the following tasks:

monitoring and diagnosing center

The on-site monitoring management unit (2) is used for the demonstration to all real-time status information of monitored equipment, monitoring facilities's start, stops and fault recovery, monitoring data's real-time display, fault alarm to and inquiry, statistics, analysis, the printing function of historical monitoring data:

1. the real-time data display is used for providing a real-time data display curve of the relevant information of various monitoring circuits;

providing the whole running state information of a shielding gate circuit, a signal machine lighting circuit, a point switch circuit and an LEU power supply circuit;

2. real-time fault alarming;

the system is used for providing a graphical alarm interface and performing real-time fault state display and alarm;

the functions of canceling alarm and recovering alarm for certain faults are provided;

displaying suspected faults, determined faults and instantaneous faults in the running process of the equipment in real time, and providing click viewing content information and time information on corresponding fault information;

3. historical data analysis

Carrying out statistics on historical monitoring data by day and week to obtain suspected faults, determining fault and instantaneous fault information, and providing click viewing content information and time information on corresponding fault information;

4. monitoring device control

Judging whether the acquisition module is overtime or broken;

the acquisition module can be automatically recovered after short-time disconnection or failure;

the related equipment acquisition circuit is deactivated after the acquisition module fails;

second, maintenance center

The method for realizing daily maintenance information processing of the monitoring equipment and the monitoring data comprises the following steps:

1. device maintenance

The monitoring system is used for configuration management of the acquisition module and configuration information processing of an equipment monitoring circuit, wherein the equipment monitoring circuit at least comprises a shielding door monitoring circuit, a signal machine monitoring circuit, a point switch monitoring circuit and an LEU power supply monitoring circuit;

completing the test and parameter configuration of the monitoring module, comprising: address, baud rate, sampling signal type and configuration of a working port;

configuring different types of monitoring circuits in each device, setting monitoring parameters of each monitoring point included in the monitoring circuits, setting an alarm mode and alarm information, configuring port information of corresponding monitoring modules, and deactivating and recovering thresholds and control logic monitoring circuits required by alarm processing of fault systems of different monitoring circuits;

the signal lamp circuit can be configured with a lighting mode CTC mode and an ITC mode corresponding to the signal lamp circuit, and corresponding configuration parameters;

2. data maintenance

Backup and restoration of the database;

importing and exporting a database;

monitoring the uploading and downloading of configuration data;

thirdly, the method is used for user management, user authorization and authentication, and parameter setting and processing of each unit:

the management includes: each unit operates the addition, modification, deletion and query of the user account;

verifying the operation authority of the login user;

setting various parameters of the unit, including data backup time interval, data compression cleaning time interval and sampling time;

the monitoring center management unit (1) is used for acquiring field monitoring data from different field monitoring management units (2), storing and processing the field monitoring data, performing statistical analysis on the field monitoring data, and acquiring and processing the field monitoring data for display.

2. The system for monitoring the operation of the urban rail transit interlocking equipment according to claim 1, is characterized in that: the monitoring center management unit (1) also comprises a centralized monitoring console (101) and a monitoring extension unit (102) which are used for displaying the real-time state information of the on-site monitoring data acquired by different on-site monitoring management units (2); the monitoring extension unit (102) of the monitoring center management unit (1) adds and deletes all managed monitoring extension unit objects and configures communication and management parameters.

3. The system for monitoring the operation of the urban rail transit interlocking equipment according to claim 1, is characterized in that: the on-site monitoring management unit (2) at least comprises: the system comprises a direct current voltage processing module (201), an alternating current voltage processing module (202), an alternating current and direct current processing module (203) and a switch machine voltage processing module (204); the monitoring system comprises a direct current voltage processing module (201), an alternating current voltage processing module (202), an alternating current and direct current processing module (203), a switch machine voltage processing module (204) and a monitoring center management unit (1), wherein the direct current voltage processing module, the alternating current and direct current processing module (202), the alternating current and direct current processing module (203) and the switch machine voltage processing module are respectively in network connection with the monitoring center management unit (1) through a first processing unit (31), a second processing unit (32), a third processing unit (33) and a fourth processing unit (34) which correspond to each other.

4. The system for monitoring the operation of the urban rail transit interlocking equipment according to claim 3, is characterized in that: the first processing unit (31), the second processing unit (32), the third processing unit (33) and the fourth processing unit (34) have the same circuit structure and all comprise: the device comprises a multipath filtering processing circuit (301), a differential multipath selection circuit (302), a multipath selection circuit (303), a conditioning circuit (304), a low-pass filtering circuit (305), an A/D conversion circuit (306), an isolation module (307), a main processor (308) and an interface circuit (309), wherein the main processor (308) is divided into two paths through the isolation module (307), one path is electrically connected with the A/D conversion circuit (306) to acquire field signals selected by the multipath filtering processing circuit (301), the other path is electrically connected with the multipath selection circuit (303) to send selection addresses to the multipath selection circuit (303), and different field signals are selected to be input through the selection addresses; the field signal selected by the multiplexer circuit (303) enters the conditioning circuit (304) and the low-pass filter circuit (305) to the A/D conversion circuit (306) through the differential multiplexer circuit (302), the A/D conversion circuit (306) converts the field analog signal into a digital signal, and the digital signal is isolated to the main processor (308) through photoelectricity; the reference voltage of the A/D conversion circuit (306) is provided by a reference voltage circuit (310), and a main processor (308) is electrically connected with the monitoring center management unit (1) through an interface circuit (309).

5. The system for monitoring the operation of the urban rail transit interlocking equipment according to claim 3, is characterized in that: the direct voltage processing module (201) comprises: a fuse wire, a current limiting resistor, a thermistor, a first processing unit (31) and an isolation circuit are respectively arranged between the input high end and the input low end of the voltage input collector, and the fuse wire, the current limiting resistor, the thermistor, the first processing unit and the isolation circuit are instantly fused when the current exceeds a rated value, so that short circuit between input terminals is prevented; a thermistor is connected in series in the voltage division circuit, the high end and the low end of the current limiting resistor are made of metal oxide film resistors, strong-current high-voltage input is subjected to voltage division and sampling through the current limiting resistor, then is reduced into a weak-voltage signal, passes through an isolation circuit, is subjected to filtering processing, and is connected to a first processing unit (31), so that direct-current voltage collection is realized.

6. The system for monitoring the operation of the urban rail transit interlocking equipment according to claim 3, is characterized in that: the alternating voltage processing module (202) comprises: the device comprises a current limiting resistor, an alternating voltage to direct voltage conversion circuit, an alternating current transformer and a second processing unit (32), wherein an input alternating current signal is converted into a rear-stage weak signal through the current limiting resistor and the alternating current transformer and then is transmitted to the second processing unit (32) through the alternating voltage to direct voltage conversion circuit, and the second processing unit (32) is simultaneously connected with signals of multiple alternating voltage sampling points.

7. The system for monitoring the operation of the urban rail transit interlocking equipment according to claim 3, is characterized in that: the AC/DC current processing module (203) comprises: the current sensor and the third processing unit (33), alternating current and direct current sampling are all obtained through the current sensor, signals output by the current sensor are converted into direct current voltage signals and then enter the third processing unit (33), and the third processing unit (33) is electrically connected with the monitoring center management unit (1) through an interface.

8. The system for monitoring the operation of the urban rail transit interlocking equipment according to claim 3, is characterized in that: the switch machine voltage processing module (204) comprises: the multi-path switch machine voltage acquisition circuit is electrically connected with the fourth processing unit (34), the positive input end and the negative input end of the switch machine voltage acquisition circuit are respectively connected with the fuse wire and the divider resistor in series, the positive input end is connected with the thermistor in series, and two end points of the positive input end and the negative input end are electrically connected with the fourth processing unit (34) after passing through the isolating circuit.

Technical Field

The invention belongs to the technical field of urban rail transit interlocking, and particularly relates to an operation monitoring system of urban rail transit interlocking equipment.

Background

Modern urban rail transit is an advanced traffic mode which is developed in France at a later date in the nineties. With the successful construction and operation of a plurality of cities in Europe, the population of the cities is continuously increased, the problem of urban traffic congestion is increasingly aggravated, the modern city has brand-new image of urban rail transit, and comfortable service quickly attracts the attention and research of domestic cities. Urban rail transit safety is the first important meaning. The urban rail transit signal system has the tasks of ensuring driving safety, coordinating train operation and improving transportation efficiency.

The interlocking system is the core equipment for ensuring the train running safety in the signal system. The interlocking system mainly ensures the driving safety by formulating a series of interlocking rules to restrict the opening and closing of signals, the rotation of turnouts, the establishment of access and the like. The interlocking system realizes the interlocking function by electrical equipment or electronic equipment, and embodies the interlocking function by a signal machine, a power switch machine and three major pieces outside a track circuit room.

During the daily operation of such an interlocking device, the following drawbacks still exist: the method comprises the following steps that related circuit arrangements are arranged on an equipment station, a non-equipment station and a trackside field, if a circuit fails, a system can only give out failure alarm information of the circuit, but cannot give out a specific position of a failure point; when interface circuits and modules of other non-signal system equipment have faults, the existing signal system can only give fault alarm information, but cannot determine whether the faults are the problems of the system.

Therefore, in the current processing, when equipment breaks down, maintenance personnel need to use instruments such as a multimeter to carry out parameter measurement one by one on circuit contacts of a circuit related to the alarm information according to incomplete alarm information provided by an interlocking system, and determine fault points according to electric parameters obtained by measurement, so that the fault repair time is delayed to a great extent, and great influence is caused on traveling. For partial faults which are recovered instantly, maintenance personnel cannot measure electrical parameters in the fault in time, judgment and follow-up processing of the faults are influenced, and even hidden fault hidden dangers can be left.

Disclosure of Invention

The invention aims to provide an operation monitoring system of an urban rail transit interlocking device, so that fault positions and fault information can be acquired in a short time, and maintenance personnel can judge and subsequently process faults in time.

In order to solve the problems, the invention aims to realize the method and the system, and relates to an operation monitoring system of an urban rail transit interlocking device.

Further, the on-site monitoring management unit includes: the switch machine comprises a point switch voltage processing module, a direct current voltage processing module, an alternating current/direct current processing module and the like; the switch machine voltage processing module, the direct current voltage processing module, the alternating current-direct current processing module and the like are all communicated with the field monitoring management unit.

Furthermore, each module of the switch machine voltage processing module, the direct current voltage processing module, the alternating current/direct current processing module and the like comprises a core acquisition unit and a processing circuit of a plurality of corresponding modules.

Furthermore, the running monitoring system of the urban rail transit interlocking equipment further comprises a core acquisition unit, and the point switch voltage processing circuit, the direct current voltage processing circuit, the alternating current/direct current processing circuit and the like are electrically connected with the core acquisition unit.

Furthermore, the core acquisition unit comprises a multi-path filter circuit, a multi-path difference multi-path selector, a path selection circuit, a conditioning circuit, a low-pass filter circuit, an AD conversion circuit, an isolation circuit, a main processor circuit and the like, and all the parts are electrically connected to realize the core acquisition unit.

Furthermore, the module processing circuits comprise a switch machine voltage processing circuit, a direct current voltage processing circuit, an alternating current and direct current processing circuit and the like. And each processing circuit is electrically connected with each module core acquisition unit.

Furthermore, the sampling loop of the direct current voltage processing circuit is connected with double fuses in series, and the sampling of the direct current voltage and the effective isolation and protection of the collected circuit are realized through the protection of high resistance voltage division, thermistors and the like.

Furthermore, the sampling loop of the alternating voltage processing circuit is connected with the double fuses in series, and the sampling of the alternating voltage and the effective isolation and protection of the collected circuit are realized through the current type voltage transformer.

Furthermore, the switch machine voltage processing circuit sampling loop is connected with the double fuses in series, and the switch machine voltage sampling and the effective isolation protection of the switch machine voltage processing circuit from the acquired circuit are realized through the protection circuits such as the high-resistance voltage division and the alternating current/direct current voltage acquisition and isolation module.

Furthermore, each processing module is directly connected with each sampling point or connected with each sampling point through a current sensor.

Furthermore, the current sensor is a non-access current transformer and is completely isolated from the current sensor by the sampling circuit.

The invention has the beneficial effects that: the running monitoring system of the urban rail transit interlocking device comprises a monitoring center management unit and a plurality of field monitoring management units, wherein the field monitoring management units are in data connection with the monitoring center management unit; the monitoring center management unit collects monitoring data and alarm information in time from the plurality of field monitoring management units, carries out centralized management and storage, carries out statistics and comprehensive analysis on each field monitoring data, and realizes maintenance and early warning on monitored equipment. The on-site monitoring management unit is arranged on a station, is directly communicated with each processing module, is responsible for reading system setting parameters, collecting monitoring data, analyzing and processing the data, simultaneously stores the data in a local database, realizes real-time monitoring and fault alarm, and transmits the monitoring data and configuration data to a central management system in time.

The present invention will be described in further detail with reference to the accompanying drawings.

Drawings

FIG. 1 is a functional block diagram of an embodiment of the present invention;

FIG. 2 is a schematic flow diagram of a field monitoring management unit;

FIG. 3 is a schematic flow diagram of a monitoring center management unit;

FIG. 4 is a functional block diagram of a first processing unit, a second processing unit, a third processing unit, and a fourth processing unit;

FIG. 5 is a schematic diagram of the DC voltage processing module 201;

FIG. 6 is a functional block diagram of the AC voltage processing module 202;

FIG. 7 is a schematic block diagram of the AC/DC current processing module 203;

FIG. 8 is a functional block diagram of the switch machine voltage acquisition module 204;

FIG. 9 is a schematic diagram of a system power supply;

in the figure: 1. A monitoring center management unit; 101. monitoring a console; 102. a monitoring management unit; 2. a field monitoring management unit; 201. a DC voltage processing module; 202. an alternating voltage processing module; 203. an AC/DC current processing module; 204. a switch machine voltage processing module; 301. a multi-path filtering processing circuit; 302. a differential multiplexing circuit; 303. a multi-path selection circuit; 304. a conditioning circuit; 305. a low-pass filter circuit; 306. an A/D conversion circuit; 307. an isolation module; 308. a main processor; 309. an interface circuit; 31. a first processing unit; 32. a second processing unit; 33. a third processing unit; 34. and a fourth processing unit.

Detailed Description

To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the following detailed description of the embodiments, structural features and effects of the present invention will be made with reference to the accompanying drawings and examples.

Example 1

As shown in figure 1, the invention relates to an operation monitoring system of an urban rail transit interlocking device, which comprises a monitoring center management unit 1 and a field monitoring management unit 2, wherein the field monitoring management units 2 (2-1, 2-2 and 2-n) are connected with the monitoring center management unit 1 through a network.

As shown in fig. 2, the on-site monitoring management unit 2 is used for performing the following tasks, including:

monitoring and diagnosing center

The on-site monitoring management unit 2 is used for the demonstration to all real-time status information of monitored equipment, monitoring facilities's start-up, stops and fault recovery, monitoring data's real-time display, fault alarm to and inquiry, statistics, analysis, the printing function of historical monitoring data:

1. the real-time data display is used for providing a real-time data display curve of the relevant information of various monitoring circuits;

providing the whole running state information of a shielding gate circuit, a signal machine lighting circuit, a point switch circuit and an LEU power supply circuit;

2. real-time fault alarming;

the system is used for providing a graphical alarm interface and performing real-time fault state display and alarm;

the functions of canceling alarm and recovering alarm for certain faults are provided;

displaying suspected faults, determined faults and instantaneous faults in the running process of the equipment in real time, and providing click viewing content information and time information on corresponding fault information;

3. historical data analysis

Carrying out statistics on historical monitoring data by day and week to obtain suspected faults, determining fault and instantaneous fault information, and providing click viewing content information and time information on corresponding fault information;

4. monitoring device control

Judging whether the acquisition module is overtime or broken;

the acquisition module can be automatically recovered after short-time disconnection or failure;

and (5) after the acquisition module fails, carrying out deactivation processing on the acquisition circuit of the relevant equipment.

Second, maintenance center

The method for realizing daily maintenance information processing of the monitoring equipment and the monitoring data comprises the following steps:

1. device maintenance

The monitoring system is used for configuration management of the acquisition module and configuration information processing of an equipment monitoring circuit, wherein the equipment monitoring circuit at least comprises a shielding door monitoring circuit, a signal machine monitoring circuit, a point switch monitoring circuit and an LEU power supply monitoring circuit;

completing the test and parameter configuration of the monitoring module, comprising: address, baud rate, sampling signal type and configuration of a working port;

configuring different types of monitoring circuits in each device, setting monitoring parameters of each monitoring point included in the monitoring circuits, setting an alarm mode and alarm information, configuring port information of corresponding monitoring modules, and deactivating and recovering thresholds and control logic monitoring circuits required by alarm processing of fault systems of different monitoring circuits;

the signal lamp circuit can be configured with a lighting mode CTC mode and an ITC mode corresponding to the signal lamp circuit, and corresponding configuration parameters;

2. data maintenance

Backup and restoration of the database;

importing and exporting a database;

and monitoring the uploading and downloading of configuration data.

Thirdly, the method is used for user management, user authorization and authentication, and parameter setting and processing of each unit:

the management includes: each unit operates the addition, modification, deletion and query of the user account;

verifying the operation authority of the login user;

and setting various parameters of the unit, including data backup time interval, data compression cleaning time interval and sampling time.

As shown in fig. 3, the monitoring center management unit 1 is configured to obtain field monitoring data from different field monitoring management units 2, store and process the field monitoring data, perform statistical analysis on the field monitoring data, and obtain and display the field monitoring data and the processed data;

compared with the on-site monitoring management unit 2, the monitoring center management unit 1 comprises a centralized monitoring console 101 and a monitoring extension unit 102, and is used for displaying the real-time state information of the on-site monitoring data acquired by different on-site monitoring management units 2.

Compared with the on-site monitoring management unit 2, the monitoring extension unit 102 of the monitoring center management unit 1 adds and deletes all managed monitoring extension unit objects, and configures communication and management parameters.

Fig. 1 is a block diagram of an on-site monitoring management unit 2.

The on-site monitoring management unit 2 at least comprises: a direct current voltage processing module 201, an alternating current voltage processing module 202, an alternating current/direct current processing module 203, and a switch voltage processing module 204; the direct-current voltage processing module 201, the alternating-current voltage processing module 202, the alternating-current and direct-current processing module 203, and the switch machine voltage processing module 204 are respectively network-linked with the monitoring center management unit 1 through the corresponding first processing unit 31, second processing unit 32, third processing unit 33, and fourth processing unit 34.

The invention also comprises a first processing unit 31, a second processing unit 32, a third processing unit 33 and a fourth processing unit 34, wherein the first processing unit 31, the second processing unit 32, the third processing unit 33 and the fourth processing unit 34 are respectively and electrically connected with the gate shielding monitoring module, the switch machine monitoring module and the signal monitoring module.

The first processing unit 31, the second processing unit 32, the third processing unit 33, and the fourth processing unit 34 are for the universality of the sampling circuit, and are convenient for future expansion and upgrade, and the sampling module completes different circuit conversion through the core processing units (the first processing unit 31, the second processing unit 32, the third processing unit 33, and the fourth processing unit 34).

As shown in fig. 4, the first processing unit 31, the second processing unit 32, the third processing unit 33, and the fourth processing unit 34 have the same circuit structure, and each of them includes: the device comprises a multi-path filtering processing circuit 301, a differential multi-path selection circuit 302, a multi-path selection circuit 303, a conditioning circuit 304, a low-pass filtering circuit 305, an A/D conversion circuit 306, an isolation module 307, a main processor 308 and an interface circuit 309, wherein the main processor 308 is divided into two paths through the isolation module 307, one path is electrically connected with the A/D conversion circuit 306 to acquire field signals selected by the multi-path filtering processing circuit 301, the other path is electrically connected with the multi-path selection circuit 303 to send selection addresses to the multi-path selection circuit 303, and different field signals are selected to be input through the selection addresses; the field signal selected by the multiplexer 303 then enters the conditioning circuit 304 and the low pass filter circuit 305 through the differential multiplexer 302 to the a/D converter circuit 306, where the a/D converter circuit 306 converts the field analog signal to a digital signal, which is then photoelectrically isolated to the main processor 308. The reference voltage of the a/D conversion circuit 306 is provided by a reference voltage circuit 310, and the main processor 308 is electrically connected to the monitoring center management unit 1 through an interface circuit 309.

Fig. 5 shows a schematic circuit diagram of the dc voltage processing module 201, in which fuses are added between the high and low input ends of the voltage input collector, and are instantly fused when the current exceeds the rated value, so as to prevent short circuit between the input terminals. A thermistor is connected in series in the voltage division circuit, the function is realized when the current of an input loop exceeds a certain current, and the resistance value is increased to several mega ohms within dozens of milliseconds until the open circuit is burnt out by the thermistor. The high end and the low end of the current-limiting resistor adopt metal oxide film resistors, strong-current high-voltage input is subjected to voltage division and sampling through the current-limiting resistor, then is reduced into weak-voltage signals, and then is connected to the first processing unit 31 after filtering processing through the isolating circuit, so that the direct-current voltage collection is realized. Isolation circuits are adopted among the channels, and the channels are not affected each other.

Fig. 6 is a schematic circuit diagram of the ac voltage processing module 202, in which an input ac signal is converted into a rear-stage weak signal by the current limiting resistor and the ac transformer, and the rear-stage weak signal is transmitted to the second processing unit 32 by the ac voltage-to-dc voltage conversion circuit, and the second processing unit 32 simultaneously accesses signals of multiple ac voltage sampling points.

The mutual inductor has higher impedance, and the upper current limiting resistor is added, so that the monitoring circuit is not influenced by the second processing unit 32, meanwhile, the fuse wire is connected in series in the sampling loop, and the fuse wire can be instantly fused under the short-circuit condition, so that the safety of the main circuit is ensured. The same method as that for sampling the direct current is adopted for sampling the alternating current. The alternating voltage sampling is collected through the alternating current transformer, and isolation from the second processing unit 32 is achieved.

Fig. 7 is a schematic diagram of the circuit of the ac/dc current processing module 203, the ac/dc current sampling is obtained by a current sensor, the current sensor is a non-access current transformer, the sampled circuit is completely isolated from the current sensor, and the sampled circuit is not affected. After the signal output by the current sensor is converted into a direct current voltage signal, the signal is collected and processed by the third processing unit 33.

Fig. 8 is a schematic circuit diagram of the switch voltage processing module 204, and the switch voltage processing module 204 includes: the multi-path switch machine voltage acquisition circuit is formed by a fuse wire, a thermistor, a divider resistor and an isolation circuit, the multi-path voltage acquisition circuit is electrically connected with the fourth processing unit 34, the fuse wire and the divider resistor are respectively connected in series at the positive input end and the negative input end of the switch machine voltage acquisition circuit, the thermistor is connected in series at the positive input end, and two end points of the positive input end and the negative input end are electrically connected with the fourth processing unit 34 after passing through the isolation circuit.

The switch machine represents that the voltage is an alternating current-direct current mixed signal, and because the voltage signal can be mixed with 380V high voltage, the voltage signal must be subjected to high-resistance current limiting and other protection, the voltage of the collected signal is converted into an alternating current component and a direct current component by the voltage representing collector, and the direct current component and the alternating current component are connected to the fourth processing unit 34. When testing the switch indication voltage of the alternating current point switch, a very high reverse electromotive force exists, the voltage can reach more than 2500V instantly, the voltage acquisition has huge impact on the circuit, and special treatment is needed on the circuit. The whole circuit adopts high resistance voltage division, and the fuse wire is respectively added between the input high end and the input low end of the voltage input collector, and is instantly fused when the current exceeds a rated value, so that the short circuit between input terminals is prevented. A thermistor is connected in series in the voltage division circuit, the function is realized when the current of an input loop exceeds a certain current, and the resistance value is increased to several mega ohms within dozens of milliseconds until the open circuit is burnt out by the thermistor.

In order to enhance the anti-interference capability of the system and improve the AD acquisition accuracy and stability of the system, the system power supply is as shown in fig. 9, and the system adopts a three-stage power supply processing mode, i.e., an AC/DC, DC/DC, LDO (low dropout linear regulator) mode. In addition, in order to reduce the interference between the analog power supply and the digital power supply, the system adopts an isolation power supply to isolate the digital power supply, the analog digital interface power supply and the analog power supply, thereby ensuring the independence of each power supply place.

In summary, the present invention includes a monitoring center management unit 1, and further includes a plurality of on-site monitoring management units 2, where the plurality of on-site monitoring management units 2 are in data connection with the monitoring center management unit 1; the monitoring center management unit 1 collects monitoring data and alarm information from the plurality of field monitoring management units 2 in time, performs centralized management and storage, performs statistics and comprehensive analysis on each field monitoring data, and realizes maintenance and early warning on monitored equipment. The on-site monitoring management unit 2 is arranged on a station, is directly communicated with each processing module, is responsible for reading system setting parameters, collecting monitoring data, analyzing and processing the data, simultaneously stores the data in a local database, realizes real-time monitoring and fault alarm, and transmits the monitoring data and configuration data to a central management system in time.

For circuit construction of a specific system, a circuit meeting requirements can be selected to be constructed in the prior art according to the specifically realized functions, and detailed description is not given in the embodiment.

The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.